If a is an acute angle and Tan (a + 10 °) = 1, then a=

If a is an acute angle and Tan (a + 10 °) = 1, then a=

tan(a+10°)=1=tan45°
So a + 10 ° is 45 degrees
Therefore, a = 35 degree

When the angle a belongs to zero to 180 degrees, how to transform the shape of the curve represented by the sine of the square multiplication angle a of equation x plus the cosine of the square multiplication angle a of equation y equal to 1

When a = 0 degree, it means two straight lines perpendicular to y axis of y = 1 and y = - 1. When a belongs to (0,45 degree), it means ellipse with focus on X axis. When a = 45 degree, it means circle with center at origin and radius under root sign (1 / Sina). When a belongs to (45,90 degree), it means ellipse with focus on Y axis. When a = 90 degree, it means x = 1, x = - 1

How to find the indefinite integral of sine square?
How to deal with the problem of ∫ (SiNx / 2) ^ 2DX

∫（sinx/2）^2dx
=∫(1-cosx)/2 dx
=(1/2) ∫1 dx- (1/2)∫cosx dx
=x/2-(1/2)sinx