Math, asked by kartikkagra, 11 months ago

cos 64 degree into cos 26 degree minus sin 64 degree into sin 26 degree

Answers

Answered by Aditya72003

Using cos(90-a)=Sina

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Answered by DevpriyaBagh

as we know cosAcosB-sinAsinB=cos(A+B)
so it will be cos(64°+26°)=cos90°=0

kartikkagra: ok

kartikkagra: tan35*tan40*tan*45*tan50*tan55=

kartikkagra: can you solve it

DevpriyaBagh: i have solved it the answer is 1.

kartikkagra: tell me how to solve

DevpriyaBagh: (tan35tan55)(tan40tan50)tan45=(tan35cot35)(tan40cot40)tan45=1

kartikkagra: thanks

DevpriyaBagh: wlcm

Aditya72003: If ABCD is a trapezium, AC and BD are the diagonals intersecting each other at point o. Then AC:BD=

Aditya72003: Could you please solve this

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