If  then the value of  is

• -1

• 2

• 1

• 1

If , the value of sin θ + cos θ is

• equal to 1

• greater than 1

• less than 1

• less than 1

63.

If θ is a positive acute angle and tan 2θ tan 3θ = 1, then the value of 
 is

• 

• 1

• 0

• 0

If  then the value of  is

In a right-angled triangle, XYZ, right-angled at Y, If  and XZ - YZ = 2, then sec X + tan X is

If tan θ - cot θ = 0 and θ is positive acute angle, then the value of  is

• 3

• 
• 
• 

If  the value of  is

If ,   then the value of  is

If sin A + sin²A = 1,  then the value of cos²A + cos⁴A is

• 2

• 
• 
• 

If , then the value of tan θ is (θ is acute)