Math, asked by nallapuramakhilaredd, 6 months ago

cos' 15º-cos? 75º =

Answers

Answered by ankitakurai

0

Step-by-step explanation:

cos '15° -cos ? 75 °= cos 60°

Answered by sritarutvik

1

Step-by-step explanation:

cos15°- cos75° =cos(45°-30°) - cos(45+30)

=(cos45°cos30°+sin45°sin30°)-(cos45°cos30-sin45°sin30°

=2sin45°sin30°

=2*1/root2 *1/2

= 1/root2

Previous Question

Next Question

Similar questions

Hindi, 3 months ago

delhi ke pravarn aur Sikkim ke pravarn ki atamkhata...

English, 3 months ago

Sometimes dreams can bring change in personality traits. The play is titled “A Bad Dream”. As Mr.Hill, write a letter to Sarah how the bad dream was actually a good dream for you.

Math, 3 months ago

£3 will buy 5 meals for one person. Work out the cost of one of the meals. Give your answer in pence.

Science, 6 months ago

Ques1. Define. (Any5) 5 i) Anemometer ii) Hygrometer iii) Compound iv) Indicators v) Excretion vi) Humidity vii) Haemoglobin viii) Wind Vane ...

Math, 6 months ago

Evaluate = -6/-11×(-4)...

Social Sciences, 10 months ago

When an advertisement is done to educate , inform and motivate the public , without expecting financial gains , it is called which advertisement...

English, 10 months ago

Change in voice.....Bring some oranges...

English, 10 months ago

the first paper mill in haryana was strated in...