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Some Applications Of Trigonometry

Question
CBSEENMA10007848

If sin θ = cos θ, then write the value of θ. 0°<θ<90°.

Solution

sin θ = cos θ
⇒ cos (90-θ) = cos θ
⇒90-θ = θ
⇒2θ = 90 ⇒ θ = 45°.