**(1) sin cosec = ?****(A) 1 (B) 0 (C) 1/2 (D) √2**

**Solution:**

sin = 1/cosec

sin cosec =(1/cosec)×cosec = 1

Hence option A is the answer.

**(2) cosec45° =?****(A) 1/√2 (B) √2 (C) √3/2 (D) 2/√3**

**Solution:**

cosec45 = √2

Hence option B is the answer.

**(3) 1 + tan ^{2} = ?**

**(A) cot**

^{2}(B) cosec^{2}(C) sec^{2}(D) tan^{2}**Solution:**

1 + tan^{2} = sec^{2}

Hence option C is the answer.

**(4) When we see at a higher level , from the horizontal line,angle formed is……. .****(A) angle of elevation. (B) angle of depression. (C) 0 (D) straight angle.**

**Solution:**

When we see at a higher level , from the horizontal line,angle formed is angle of elevation.

Hence option A is the answer.