Math, asked by Subhendu1, 1 year ago

Shiw that cos36°cos54°-sin36°sin54°=0

Answers

Answered by hritikasawant

12

cos(A+B)=cosAcosB-sinAsinB

Therefore ,
cos36°cos54°-sin36°sin54° = cos(36+54)°
= cos 90° = 0
Hope this helped you

Previous Question

Next Question

Similar questions

Chemistry, 8 months ago

Is heating of sodium hydride a redox reaction?

English, 8 months ago

People from all over the world (a)…………tea. Tea plant grows from its seed. Tea grows best in hot and moist countries. The slopes of hills are the (b)…………….places for its cultivating. Bangladesh earns a lot (c)……….foreign currency by exporting tea. (a) (i) takes (ii) take (iii) took (iv) taken (b) (i) best (ii) good (iii) better (iv) great (c) (i) can (ii) the (iii) of (iv) off...

Science, 8 months ago

ਧਰਤੀ ਉੱਤੇ ਮੌਸਮਾਂ ਵਿੱਚ ਤਬਦੀਲੀ ਇਸ ਲਈ ਵਾਪਰਦੀ ਹੈ ਕਿਉਂਕਿ ____ The change in seasons on the earth occurs because ___ पृथ्वी पर ऋतुओं में परिवर्तन इसलिए होता है ____ * ਧਰਤੀ ਅਤੇ ਸੂਰਜ ਦਰਮਿਆਨ ਦੂਰੀ ਨਿਰੰਤਰ ਨਹੀਂ ਹੈ. the distance between the earth and the sun is not constant. पृथ्वी और सूर्य के बीच की दूरी स्थिर नहीं है। ਧਰਤੀ ਦੇ ਘੁੰਮਣ ਦੀ ਧੁਰਾ ਇਸ ਦੇ ਚੱਕਰ ਦੇ ਤਲ ਦੇ ਸਮਾਨਅੰਤਰ ਹੈ.the axis of rotation of the earth is...

English, 1 year ago

Do you believe that puru was really proud? give reasons. do you justify his pride? how...

Math, 1 year ago

what is the Angle in the equilateral triangle...

Hindi, 1 year ago

conversation two friends about diwali festival in hindi...

Social Sciences, 1 year ago

What is cyebercrime and how it is realated to Internet...

Hindi, 1 year ago

conversation between two friends on diwali festival...