1.

6. Find the value of sin 25e tan 23cos 65°cot 670

Answer»

Sin 25 = cos(90 - 25)

= cos 65.

Tan 23 = cot(90 - 23)

= cot 67.

Given, sin 25/cos 65 + tan 23/cot67

= cos65/cos65 + cot67/cot67

= 1 + 1

= 2.



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