find the value of cos^2 15°- cos ^2 75° ÷ sin^2 75° - sin^2 15°
explain step by step plz
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0
Answer:
simple i dont know
Step-by-step explanation:
just ask your teacher
she will explainded to you
Answered by
1
Answer:
Given, cos275° - sin215°
Need to prove the given equation as zero
⇒ we know that cos(90 - θ) = sinθ
∴ cos75° = cos(90 - 15)°
= sin15° - - - eq (1)
⇒ Substitute eq(1) in the given equation
∴ cos275° - sin215°
=sin215° - sin215° = 0
Hence, proved
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